Evaporator.



N0. 884,272. Y PATBNTED APR. 7, 1908.

G. H. GRIMM. BVAPORATOR.

APPLIUATIONHLBD DEc.s.`19oe.

W sl l lf/ v v Byml@ ATTO/mers GUSTAV HENRY GRIMM, OF RUTLAND, VERMONT.

EVAPORATOR. l

Specification of Letters Patent.

Patented April 7, 1908.

Application filed December 8, 1906. Serial N o. 346,876.

To all whom it may concern.'

Be it known that I, GUsTAv HENRY GRIMM, a citizen of the United States, and a resident of Rutland, in the county of Rutland and State of Vermont, have invented a new and Improved Evaporator, of which the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved evaporator for use in the manufacture of maple sugar, sorghum, fruit jellies and other food products, and arranged to insure a steady iiow of the sap, to prevent any scum and sediment from mixing with the sweet, syrup or like product, and to insure the production of a pure, light-colored syrup of high quality and fine flavor,

The invention consists of novel features and parts and combinations of the same, which will be more fully described hereinafter and then pointed out in the claims.

A practical embodiment of the invention is represented in the accom anying drawings forming a part of this specification, in which similar characters of reference indicate cor-l res onding parts in all the views.

igure l 1s a perspective view of the improvement; Fig. 2 is an enlarged transverse section of the same on the line 2-2 of Fig. l; Fig. 3 is a cross section of a pan and boiler of .modified form 5 and Fig. 4i is a sectional plan building in which the evaporator is located.

Cn top of the furnace A and at the front end thereof is arranged the boiling pan B containing a preliminary heating receptacle C for the sap or other liquid to be treated, and the said preliminary receptacle C is connected by a }pipe D with an overhead tank E containing t e sap, so that the latter flows by its own gravity through the receptacle, and from the latter by a pipe F into the regulator G having a. connection H with the boiling an B to maintain the sap at a uniform depth in the pan B.

The pan B is connected by a Siphon I with the first evaporating pan J seated next to the boiling pan B. The pan J is connected by a Siphon K with the second evaporating pan J and the latter is connected by a siphon K with the third evaporatingy an J2, and the several evaporating pans are ocated one alongside the other on the top of the furnace A at the rear portion thereof. Each of the evaporating pans, J, J J2 is preferably provided with a transverse partition J3 to cause the fluid to flow in a zig zag course through the several evaporating pans J, J J 2,.to be iinally discharged from the last evaporating pan at the outlet J4. The regulator' G the siphons and the pans J, J J2 are of the usual construction, so that further detail description ofthe same is not deemed necessary.

The reliminary heating receptacle C in the bo' ing pan B is formed of two hollow partitions C C2 extending longitudinally in the pan B, and connected with each other at the rear ends and near their tops by a cross pipe C3. The front ends of the partitions C and C2 are connected near the to s with the ipes D and F respectively. Eac partition C and C2 is preferably V-shaped in cross section, and its side members form integral `parts of the sections forming the corrugated ottom of the pan B, as plainly indicated in Fig. 2 the side members of the partitions C and C2 terminating at their upper ends in overlapping top members to close the partitions at the top. The lower or meeting edges of the side members of each partition are preferably fastened together by solder, as indicated in Fig. 2. The seam thus formed is not liable to become open as the sap covers the seam inside the partition and the sap is also close or adjacent to the seam within the pan B.

The partitions C and C2 form with the sides of the pan B compartments for the flow of the sap, and the partition C2 terminates a distance from the rear end of the pan B, to allow the sap entering the 'front end of the rst compartment by the pipe H, to flow rearwardly and then into the rear end of the second or middle compartment to the front end thereof. The partition C terminates a distance from the front end of the pan B, so that the sap can flowfrorn the front end of the middle compartment into the front end of the third compartment and rearwardly therein, to finally pass from the rear end of the third compartment by way of the siphon I into the first evaporating pan J.

Now when the apparatus is in use and the fuel in the furnace is burning then the pans B, J, J J 2 and their contents are heated, and as the hollow partitions C, C2 have their lower portions extending into the sap in the pan B, and the upper portions are subjected to the heat from the vapors rising in the pan B, it is evident that the sap in the said partitions C, C2 and ipe C3 is heated and passes in a heated conc ition through the regulator G and pipe H into the pan B. The sap in its zig zag passagethrough the pan B is subjected to the highest heat develo ed in the furnace A, and hence the sap is oiled and thereby clarified, the scum being skimmed off, and the clarified sap only passes into the finishing pan J by way of the siphon I.

By the arrangement described, the sap from the storage tank receives a preliminary heating in the receptacle C before passing into the boiling tank B and without requiring an outside heating medium and without taking up much space in the boiling tank B, thus leaving the ca acity of the latter practically untouched. t is also understood that the heater C is used for producing a zig zag fiow in a longitudinal direction of the sap in the boiling pan B, and by constructing the pan B and lthe heater as described very little more material is used in the construction of the apparatus over apparatus as heretofore constructed.

lThe preliminary heating receptacle C5 shown in Fig. 3 is for use in boiling pans B of evaporators as heretofore constructed and can be readily set up in the pan and connected as described in reference to the receptacle C in the pan B.

In the modified form shown in Fig. 4, the hollow receptacle C6 set in the pan B2 is corrugated in a vertical direction, to form a zig zag passage for the sap in a longitudinal direction, thus increasing the heating capacity of the receptacle in a given length.

Having thus described my invention, I claim as newand desire to secure by Letters Patent 1. An evaporator having a pan, a preliminary heating receptacle in the form of a plurality of connected partitions arranged in the pan and extending into the sap oontained in the pan, and a regulator for controlling the flow of thesap from the receptacle into the pan.

2. An evaporator having a pan, a preliminary heating receptacle in the form of a plurality of connected partitions arranged in the pan and extending into the sap contained in the pan, an overhead tank connected with the inlet end of the receptacle, and a regulator connected with the outlet end of the receptacle and with the said pan.

3. An evaporator provided with a preliminary heating receptacle approximately V-shaped in cross section, and aV pan containing the said receptacle, the latter forming a partition in the pan.

4. An evaporator provided with a preliminary heating receptacle approximately V-shaped in cross section, and a pan containing the said receptacle, the latter forming a partition in the pan to provide separate compartments connected with each other at one end.

5. An evaporator provided with a preliminary heating receptacle approximately V-shaped in cross section, and a pan containing the said receptacle, the latter forming a partition in the pan, the bottom portion of the partition extending into the sap contained in the pan.

6. An evaporator provided with a preliminary heating receptacle approximately V-shaped in cross section, and a pan containing the said receptacle, the latter forming a partition in the pan, the bottom portion of the partition extending into the sap contained in the pan, the inlet and outlet being at the ends of the partition near the top.

7. An evaporator comprising a pan and a hollow partition therein for the passage of the sap through the partition and through the compartments formed by the partition, the said pan and partition being formed of sections, each section forming part of the `pan and part of the partition.

8. An evaporator comprising a pan and a hollow partition therein for the passage of the sap through the partition and through the compartments forme'd by the partition, the said pan and partition being formed of sections, each having integral members, of which one forms part of the pan bottom and the other member a side of the hollow partition.

9. An evaporator comprising a pan and a hollow partition thereinfor the passage of the sap through the partition and through the compartments formed by the partition, the said pan and partition being formed of sections, each having integral members, of whichone forms part of the pan bottom and the other member a side of the hollow partition, and lower meeting ends of the obliquely disposed sides of the partition being soldered together.

l0. An evaporator comprising a pan anda hollow partition therein for the passage of the sap through the partition and through the compartments formed by the partition, the said pan and partition being formed'of sections, each having integral members, of which one forms part of the pan bottom and the other member a side and top of the hollow partition.

1l. An evaporator having a pan, a preliminary heating receptacle arranged in the panI said receptacle comprising a plurality In testimony whereof I have signed my of connected hollow sections, the sections name to this specification in the presence of being arranged in parallelism and spaced l two subscribing witnesses.

apart from each other, the alternate parti- GUSTAV HENRY GRIMM. tions being adjacent to one end of the pan, l/Vitnesses:

and the intermediate partitions adjacent to THEO. G. HOSTER, the other end.

EVERARD B. MARSHALL. 

